Thankyou for sharing this Le Loup, I have been experimenting the last few days with natural tinders following your guide, I have found punk wood works very well just like you say, have also tried cattail as well and found the head worked by just holding it in the flame over fire then letting it smoulder all the way down to it's end until it stops smoking heavily (not sure if that's the correct way but it worked) the dead stalks only of cattail also worked quite well by splitting them in half lengthways then holding in the flame to char. By chance I came across another youtube video by a guy called Pembury Woods advocating the same method who credits you for showing him, he says it seemed the best punk wood seemed to be that which was whitest in colour and I found that to be the case too in my few limited experiments. I had not used this method before and am now a complete convert to this method over char cloth, like you say for long term sustainability you will eventually run out of cloth and won't want to start cutting up your clothes. Thanks for posting the video, I am going through your other videos on your channel about plant tinders etc etc.